diff --git a/nssjson/ordered_dict.py b/nssjson/ordered_dict.py

index 87ad888..2221c6b 100644

--- a/nssjson/ordered_dict.py

+++ b/nssjson/ordered_dict.py

@@ -3,7 +3,7 @@

 http://code.activestate.com/recipes/576693/

 """

-from UserDict import DictMixin

+from collections import MutableMapping as DictMixin

 # Modified from original to support Python 2.4, see

 # http://code.google.com/p/simplejson/issues/detail?id=53

@@ -90,9 +90,9 @@ class OrderedDict(dict, DictMixin):

     pop = DictMixin.pop

     values = DictMixin.values

     items = DictMixin.items

-    iterkeys = DictMixin.iterkeys

-    itervalues = DictMixin.itervalues

-    iteritems = DictMixin.iteritems

+    iterkeys = DictMixin.keys

+    itervalues = DictMixin.values

+    iteritems = DictMixin.items

     def __repr__(self):

         if not self:

-- 

2.25.1